Some ssl fixes (#919)

Fix return of wrap_socket.
Add read, write, pending to SSLSocket
Fix argument to socket.setdefaulttimeout

stdlib/3/urllib/request.pyi

@@ -30,6 +30,7 @@ def url2pathname(path: str) -> str: ...
 def pathname2url(path: str) -> str: ...
 def getproxies() -> Dict[str, str]: ...
 def parse_http_list(s: str) -> List[str]: ...
+def parse_keqv_list(l: List[str]) -> Dict[str, str]: ...
 
 class Request:
     if sys.version_info >= (3, 4):